Dietary Supplement. Non-Bitter. Zero Calories. NuNaturals uses our special, highly concentrated Stevia extract, NuStevia from which the bitterness of the extract has been removed. NuStevia is a natural plant extract. Maltodextrin is a carbohydrate. It is added to make it easier to measure the Stevia extract. NuNaturals uses plant-based natural flavors to help make our Stevia products the best-selling one available.